Gwent's Police and Crime Commissioner and Gwent Police's former chief constable will appear before the Home Affairs Select Committee in London later.
Both parties will give their side of events that led to Mrs Napier's departure at the meeting in Westminister this afternoon.
More top news
The man and woman who were found dead this morning on a Cardiff street were stabbed. Warning: Graphic content.
Temperatures are the main talking point today, with highs of 20C if you are lucky enough to see the sunshine!
A 20-year-old man from Gwent has been arrested after a man and woman were found dead on a Cardiff Street. Warning: Graphic Content